Mrs. Woods prepared bags of baked cookies. The graph shows the number of bags and the number of cookies she used. She distributed the cookies evenly throughout all the bags. How many cookies did she use per bag?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.